gnu: python-txacme: Update to 0.9.3-0.ac18f92, fix build.

* gnu/packages/python-xyz.scm (python-txacme): Update to 0.9.3-0.ac18f92.
[source]: Switch to git-fetch and use the latest commit from trunk
branch.
[arguments] <test-backend>: Use 'custom.
<test-flags>: Provide option to run tests with twisted.
[native-inputs]: Remove python-fixtures, python-hypothesis, python-mock,
python-service-identity, python-testrepository, python-testscenarios,
and python-testtools; add python-setuptools.

Change-Id: Ifd7feb33bbca051e61f9eddf7b6e1a5026ec5568

gnu/packages/python-xyz.scm

@@ -33524,16 +33524,30 @@ with the Twisted web framework.")
       (license license:expat))))
 
 (define-public python-txacme
+  ;; 0.9.3 tag was placed in 2020 and there a lot of changes providing
+  ;; compatibility wit twisted, use the latest commit from trunk branch.
+  ;;
+  ;;See: <https://github.com/twisted/txacme/issues/165>.
+  (let ((commit "ac18f92f6dde971a6b38f2ecfae44665815db583")
+        (revision "0"))
     (package
       (name "python-txacme")
-    (version "0.9.2")
+      (version (git-version "0.9.3" revision commit))
       (source
        (origin
-       (method url-fetch)
-       (uri (pypi-uri "txacme" version))
+         (method git-fetch)               ;no fresh release in PyPI
+         (uri (git-reference
+                (url "https://github.com/twisted/txacme")
+                (commit commit)))
+         (file-name (git-file-name name version))
          (sha256
-        (base32 "1cplx4llq7i508w6fgwjdv9di7rsz9k9irfmzdfbiz6q6a0ykf1d"))))
-    (build-system python-build-system)
+          (base32 "0mgdfxldv8qflbn75ywslbarnd4i3l7c4krs4aibl2dpryclsjzs"))))
+      (build-system pyproject-build-system)
+      (arguments
+       (list #:test-backend #~'custom
+             #:test-flags #~(list "-m" "twisted.trial" "txacme")))
+      (native-inputs
+       (list python-setuptools))
       (propagated-inputs
        (list python-acme
              python-attrs
@@ -33543,14 +33557,6 @@ with the Twisted web framework.")
              python-treq
              python-twisted
              python-txsni))
-    (native-inputs
-     (list python-fixtures
-           python-hypothesis
-           python-mock
-           python-service-identity
-           python-testrepository
-           python-testscenarios
-           python-testtools))
       (home-page "https://github.com/twisted/txacme")
       (synopsis "Twisted implexmentation of the ACME protocol")
       (description
@@ -33561,7 +33567,7 @@ Certificate Authority.
 
 txacme is an implementation of the protocol for Twisted, the event-driven
 networking engine for Python.")
-    (license license:expat)))
+    (license license:expat))))
 
 (define-public python-pysaml2
   (package